Main Stud Kit 2001-2005 GM 6.6L Duramax LB7/LLY XDP Xtreme Diesel Performance
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
Description
Description
This Part Fits:
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2001 | Chevrolet | Silverado 2500 | ||
| 2002 | Chevrolet | Silverado 2500 | ||
| 2003 | Chevrolet | Silverado 2500 | ||
| 2004 | Chevrolet | Silverado 2500 | ||
| 2001 | GMC | Sierra 2500 | SL | |
| 2002 | GMC | Sierra 2500 | SL | |
| 2001 | GMC | Sierra 3500 | SLT | |
| 2002 | GMC | Sierra 3500 | SLT | |
| 2003 | GMC | Sierra 3500 | SLT | |
| 2004 | GMC | Sierra 3500 | SLT | |
| 2005 | GMC | Sierra 3500 | SLT | |
| 2001 | GMC | Sierra 2500 | SLT | |
| 2002 | GMC | Sierra 2500 | SLT | |
| 2003 | GMC | Sierra 2500 | SLT | |
| 2004 | GMC | Sierra 2500 | SLT | |
| 2001 | GMC | Sierra 3500 | SLE | |
| 2002 | GMC | Sierra 3500 | SLE | |
| 2003 | GMC | Sierra 3500 | SLE | |
| 2004 | GMC | Sierra 3500 | SLE | |
| 2005 | GMC | Sierra 3500 | SLE | |
| 2001 | GMC | Sierra 2500 | SLE | |
| 2002 | GMC | Sierra 2500 | SLE | |
| 2003 | GMC | Sierra 2500 | SLE | |
| 2004 | GMC | Sierra 2500 | SLE | |
| 2001 | Chevrolet | Silverado 3500 | ||
| 2002 | Chevrolet | Silverado 3500 | ||
| 2003 | Chevrolet | Silverado 3500 | ||
| 2004 | Chevrolet | Silverado 3500 | ||
| 2005 | Chevrolet | Silverado 3500 | ||
| 2001 | GMC | Sierra 3500 | SL | |
| 2002 | GMC | Sierra 3500 | SL | |
| 2001 | Chevrolet | Silverado 2500 | LT | |
| 2002 | Chevrolet | Silverado 2500 | LT | |
| 2003 | Chevrolet | Silverado 2500 | LT | |
| 2004 | Chevrolet | Silverado 2500 | LT | |
| 2001 | Chevrolet | Silverado 3500 | LT | |
| 2002 | Chevrolet | Silverado 3500 | LT | |
| 2003 | Chevrolet | Silverado 3500 | LT | |
| 2004 | Chevrolet | Silverado 3500 | LT | |
| 2005 | Chevrolet | Silverado 3500 | LT | |
| 2001 | Chevrolet | Silverado 3500 | LS | |
| 2002 | Chevrolet | Silverado 3500 | LS | |
| 2003 | Chevrolet | Silverado 3500 | LS | |
| 2004 | Chevrolet | Silverado 3500 | LS | |
| 2005 | Chevrolet | Silverado 3500 | LS | |
| 2001 | Chevrolet | Silverado 2500 | LS | |
| 2002 | Chevrolet | Silverado 2500 | LS | |
| 2003 | Chevrolet | Silverado 2500 | LS | |
| 2004 | Chevrolet | Silverado 2500 | LS | |
| 2002 | GMC | Sierra 3500 | ||
| 2003 | GMC | Sierra 3500 | ||
| 2004 | GMC | Sierra 3500 | ||
| 2005 | GMC | Sierra 3500 | ||
| 2002 | GMC | Sierra 2500 | ||
| 2003 | GMC | Sierra 2500 | ||
| 2004 | GMC | Sierra 2500 | ||
| 2003 | GMC | Sierra 2500 | WT | |
| 2004 | GMC | Sierra 2500 | WT | |
| 2004 | Chevrolet | Silverado 3500 | WT | |
| 2004 | Chevrolet | Silverado 2500 | WT | |
| 2004 | GMC | Sierra 3500 | WT | |
| 2005 | GMC | Sierra 3500 | WT |
Specifications:
| Country of Origin | USA |
| Sold As | Kit |
| Availability | Available |
| Universal | No |
| About |
XDP is a leading retailer, distributor, and manufacturer of top-quality OE, OER, and aftermarket diesel parts and accessories. Strategically positioned across the United States, XDP houses one of the largest and most diverse diesel-specific inventories in the industry. For the last 20 years, XDP has proudly served the diesel community and diesel industry across North America and Canada. We're ready to meet the needs of you and your vehicle, whether it be for work, play, towing or hauling. We know what moves you! |
The XDP X220 Main Stud Kit XD3007MS is essential for setting up your 2001-2005 GM 6.6L Duramax LB7/LLY for competition or street use. OEM main bolts typically struggle to handle the pressure in high-horsepower engines.
Constructed using an 8740 Chromoly with an added proprietary element ensures these studs are more durable and will not stretch like the factory bolts. The threads are rolled after heat-treating to deliver optimum fatigue strength. These studs are rated at 210,000-230,000 psi yield strength and 220,000-236,000 psi tensile strength to ensure a strong hold under higher combustion pressures.
In addition to the increased strength, replacing the main bolts with studs also allows you to obtain a more precise torque reading. A bolt gets twisted as it is tightened, so it's reacting to two different forces at the same time.
With a stud the force gets applied to the vertical axis, resulting in a more even clamping force. These are a must have for high-performance applications and are reusable, unlike the OEM Torque-To-Yield (TTY) bolts which must be replaced after each use.
Furthermore, they can help offer easier engine assembly and proper alignment of the main bearing caps every time. Included in this kit are 12-point nuts, washers, installation instructions. Assembly lubricant sold separately.
Features:
- Includes 12-Point Nuts & Washers
- Yield Strength: 210,000-230,000 PSI
- Tensile Strength: 220,000-236,000 PSI
- Threads Rolled After Heat Treatment
- Reusable Studs, Unlike TTY OEM Bolts
- 10mm Studs Test Out At Max Load Of Over 120KN
- 8740 Chromoly Construction With Added Proprietary Element
Tech Tips:
XDP Thread Cleaning Chasers (Sold Separately):
Both the XD40126TC and XD40125T are a great add-on that will be critical during installation. Thread Cleaning Chasers are an excellent tool to have on-hand to ensure you have properly cleaned the threads in your engine block before the installation of any fasteners. Clean threads provide accurate torque readings and will help give you peace of mind during your engine build or head gasket repair.
XDP X-TRA Slick Engine & Fastener Assembly Lubricant (Sold Separately):
The use of XD541 is highly recommended during engine assembly. Apply XDP X-TRA Slick Lubricant to head studs, head bolts, main studs, main bolts, connecting rod bolts, and any other fasteners used during engine assembly.
Using a proper assembly lubricant during fastener installation reduces friction and torque pre-load scatter in the torquing sequence, while also helping to prevent thread galling and seizing.
